<template>
	<view>
	  <view class="search-box">
		  <!--使用uni-ui 提供的搜索组件-->
		  <uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
	  </view>
		<!--搜索建议列表-->
		<view class="sugg-list" v-if="searchResults.length !== 0" >
			<view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item.goods_id)">
				<view class="goods-name">{{item.goods_name}}</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view>
		<!--搜索历史-->
		<view class="history-box" v-else>
			<!--标题区域-->
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons type="trash" size="17" @click="clean"></uni-icons>
			</view>
			<view class="history-list">
				<uni-tag :text="item" v-for="(item,i) in historys" :key="i" @click="gotoGoodsList(item)"></uni-tag>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				timer: null,
				kw: '',
				searchResults: [],
				historyList: []
			}
		},
		onLoad() {
			this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
		},
		computed: {
			historys() {
				return [...this.historyList].reverse()
			}
		},
		methods: {
			// input 输入事件的处理函数
			input(e) {
				clearTimeout(this.timer)
				this.timer = setTimeout(() => {
					this.kw = e
					this.getSearchList()
				},500)
			},
			async getSearchList() {
				if(this.kw === '') {
					this.searchResults = []
					return
				}
				const { data: res} = await uni.$http.get('/api/public/v1/goods/qsearch',{ query: this.kw})
				if (res.meta.status !== 200) return nui.$showMsg()
				// console.log(res.message)
				this.searchResults = res.message
				this.saveSearchHistory()
			},
			gotoDetail(goods_id) {
				uni.navigateTo({
					url: '/subpkg/goods_detail/goods_detail?goods_id' + goods_id
				})
			},
			saveSearchHistory() {
				// this.historyList.push(this.kw)
				const set = new Set(this.historyList)
				set.delete(this.kw)
				set.add(this.kw)
				this.historyList = Array.from(set)
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
			},
			clean() {
				this.historyList = []
				uni.setStorageSync('kw','[]')
			},
			gotoGoodsList(kw) {
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?query=' + kw
				})
			}
		}
	}
</script>

<style lang="scss">
.search-box{
	position: sticky;
	top: 0;
	// 提高层级，防止被轮播图覆盖
	z-index: 999;
}
.sugg-list {
	padding: 0 5px;
	.sugg-item {
		font-size: 12px;
		padding: 13px 0;
		border-bottom: 1px solid #efefef;
		display: flex;
		align-items: center;
		justify-content: space-between;
		.goods-name {
			white-space: nowrap;
			overflow:  hidden;
			text-overflow:  ellipsis;
			margin-right: 3px;
		}
	}
}
.history-box {
	padding: 0 5px;
	.history-title {
		display: flex;
		justify-content: space-between;
		align-items: center;
		height: 40px;
		font-size: 13px;
		border-bottom:1px solid #efefef;
	}
	.history-list {
		display: flex;
		flex-wrap: wrap;
		.uni-tag {
			margin-top: 5px;
			margin-right: 5px;
		}
	}
}
</style>
